Eberron is perfect for an production, with the style "Indiana Jones meets Lord of the Rings".
Red Steel/Savage Coast may be a good hook for public who enjoyed "Pirattes of the Caribean Sea", but Mystara isn't ready in this phase. Maybe in the next.
Hollow World has got dinosaurs and ancient cultures.
The world of Cerilia (Birthright) has a great potential for the fandom who enjoyed with Games of Thrones, but here the key is a really good story, and this is is a true challenge for scripters and writters. Maybe WotC should allow fanfiction setted in this world like a free self-promotion, in a section of DM Guild of "amateur fiction" and "webcomics".
The future movies of "Ology" could be like a playtesting to discover what are the right keys to be pushed.
Pirates and wizards and monsters, oh my.
www.looper.com
The lore of Ravenloft could be altered to allow stories where dark powers can taint or curse zones from other worlds, even with modern technology. The teleserie "American Horror Story" and the movies "Scaries Stories to tell in the Dark", "Ready or not", "Crimson Peaks" or the 1999 remake of "House of Haunted Hill" are good examples of how could be a Ravenloft movie, as blocbuster or only serie B. Enternaiment One has got some experiencie producing horror movies. Even Ravenloft could allow true crazy ideas for crossovers, for example an Italian(american) police is investigating about a maffia boss and his children. He finds a clue linked to a "haunted house" in a far and lost town. He works as an infiltrated in a secret group, and this decide a raid within that haunted house, because this may be the hidding place or "safe house" of a dangerous criminal and leader of a destructive sect. They enter and don't survive, but this isn't the end, but only the begging. When they awake up and they open the eyes, they discover they are again in the world of the living ones... but reincarnated..... as action figures (Micronauts). With help by rescued children they found in the cellar they have to defeat a carrionette, a sentient toys (like Maligno, the dark-lord of Odiare) who wants to sacrifice some children to become human.